Sneak Peek: "The Voice" Serves Strong Vocals

Check out Judith Hill's blind audition for "The Voice" Season 4. The show returns to NBC on March 25 at 8 p.m. with some of the strongest vocalists from across the country invited to compete. Celebrity musician coaches Adam Levine and Blake Shelton return along with new coaches, Usher and Shakira, while Carson Daly continues to serve as host and Christina Milian as social media correspondent.